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首页> 外文期刊>ISIJ international >Melting Separation Behavior and Mechanism of High-chromium Vanadium-bearing Titanomagnetite Metallized Pellet Got from Gas-based Direct Reduction
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Melting Separation Behavior and Mechanism of High-chromium Vanadium-bearing Titanomagnetite Metallized Pellet Got from Gas-based Direct Reduction

机译：气态直接还原法制得高铬钒钛磁铁矿金属化球团的熔体分离行为及机理

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摘要

The recoveries of vanadium, chromium, and titanium are much low in the current process of high-chromium vanadium-bearing titanomagnetite. The gas-based direct reduction followed by melting separation process was proposed because the valuable elements including iron, vanadium, chromium, and titanium can be utilized simultaneously and all the recoveries should increase. The melting separation study was carried out in the present work, and the behavior as well as mechanism during melting separation process was investigated. The effect of temperature on the melting separation kinetic was more considerable than thermodynamic. As increased basicity, the area of liquid phase was enlarged and the solubility of Al_2O_3 in slag was increased. The main mineral in separation slag was anosovite (MgTi_2O_5), besides a small number of pseudobrookite (Fe_2TiO_5), perovskite (CaTiO_3), and spinel (Ca_3Al_2O_6). The melting separation was improved by the increasing C/O, temperature, time, additive of CaF_2, and basicity. The rational melting separation parameters for high-chromium vanadium-bearing titanomagnetite contained a C/O of 1.2, a melting temperature of 1 625℃, a melting time range of 40-50 min, an additive CaF_2 of 2%, and a basicity of 1.1. Under these conditions (melting time of 50 min), the melting separation was achieved successfully. Both the titanium-bearing slag together with the iron containing vanadium and chromium was obtained. The recoveries of Fe, V, Cr, and TiO_2 could reach around 99%, 97%, 92%, and 94%, respectively; and the mass fraction of Fe, V Cr, and TiO_2 were 93.50%, 0.90%, 0.69%, and 37.52%, respectively.
机译：在目前的高铬钒钛磁铁矿工艺中，钒，铬和钛的回收率很低。提出了基于气体的直接还原然后进行熔融分离的方法，因为可以同时利用铁，钒，铬和钛等有价值的元素，并且所有回收率都应提高。本文对熔融分离进行了研究，并对熔融分离过程中的行为和机理进行了研究。温度对熔融分离动力学的影响比热力学更重要。随着碱度的提高，液相面积增大，Al_2O_3在炉渣中的溶解度增加。分离炉渣中的主要矿物是凹凸棒石（MgTi_2O_5），此外还有少量的假板钛矿（Fe_2TiO_5），钙钛矿（CaTiO_3）和尖晶石（Ca_3Al_2O_6）。通过增加C / O，温度，时间，CaF_2的添加量和碱度，可以改善熔融分离。高铬钒钛磁铁矿的合理熔融分离参数包括C / O为1.2，熔融温度为1625℃，熔融时间范围为40-50分钟，添加的CaF_2为2％，碱度为1.1。在这些条件下（熔融时间为50分钟），成功实现了熔融分离。既得到了含钛的渣，又得到了含钒和铬的铁。 Fe，V，Cr和TiO_2的回收率分别约为99％，97％，92％和94％。 Fe，V Cr和TiO_2的质量分数分别为93.50％，0.90％，0.69％和37.52％。

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  • 来源
    《ISIJ international》 |2016年第2期|210-219|共10页
  • 作者

    Jue TANG; Mansheng CHU; Cong FENG; Yating TANG; Zhenggen LIU;

  • 作者单位

    Institute of Ferrous Metallurgy, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang, 110819 China;

    Institute of Ferrous Metallurgy, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang, 110819 China;

    Institute of Ferrous Metallurgy, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang, 110819 China;

    Institute of Ferrous Metallurgy, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang, 110819 China;

    Institute of Ferrous Metallurgy, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang, 110819 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    high-chromium vanadium-bearing titanomagnetite; gas-based direct reduction; melting separation; recovery;

    机译：高铬钒钛磁铁矿;气基直接还原熔融分离复苏;

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